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How create a filter for OCAF stored shapes?

Anonymous's picture
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Hello,
i write a program for storing/displaying various shapes in OCAF document. In this program, i need some modes of work: 1st - only with shapes, stored under label A of OCAF tree, 2nd - for shapes under label B, etc. During this modes, i'll must see all shapes, but highlight/selection shall work only for desired shapes. Please help me find a way to solve this problem.